CN101978595B - System and method of companding an input signal of an energy detecting receiver - Google Patents
System and method of companding an input signal of an energy detecting receiver Download PDFInfo
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- CN101978595B CN101978595B CN200880128179.1A CN200880128179A CN101978595B CN 101978595 B CN101978595 B CN 101978595B CN 200880128179 A CN200880128179 A CN 200880128179A CN 101978595 B CN101978595 B CN 101978595B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D1/00—Demodulation of amplitude-modulated oscillations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B2001/6908—Spread spectrum techniques using time hopping
Abstract
An apparatus configured as a compandor to achieve a defined dynamic range for an output signal in response to an input signal. In particular, the apparatus comprises a first circuit adapted to generate a first signal from the input signal, wherein the first signal includes a first dynamic range (e.g., a first sensitivity and first compression point); and a second circuit adapted to generate a second signal from the input signal, wherein the second signal includes a second dynamic range (e.g., a second sensitivity and second compression point) that is different from the first dynamic range of the first signal. The apparatus may further include a third circuit adapted to generate an output signal related to a sum of the first and second signals. By adjusting the first and second dynamic ranges, an overall dynamic range for the output signal of the companding apparatus may be achieved.
Description
Technical field
The present invention relates generally to communication system, and more particularly, relates to the system and method for the input signal of companding energy detection device.
Background technology
Rely on the power-limited communicators that operate such as such as battery conventionally to use in order to the set functional technology that consumes power relatively to be in a small amount provided simultaneously.A kind of aspect popular ever-increasing technology relate to and receive signal by pulse modulation technique.This technology relates generally to be carried out reception information and operates with low-power mode at the time durations of received pulse not with low duty cycle pulse.Therefore,, in these devices, power efficiency is better than operating continuously the communicator of receiver conventionally.
Conventionally, in the time using pulse modulation technique, use energy detection device.In described receiver, conventionally input signal is applied to non-linear device (for example, rectangular pulse forms device substantially), import pulse into detect.But non-linear or rectangular pulse forms device makes the dynamic range of input signal increase by two (2) times (as measured taking decibel (dB) as unit) conventionally.Because the essence of the dynamic range of input signal increases, thus the power level of control inputs signal answered, to prevent compression or be reduced on the contrary the sensitiveness lower than the follow-up reception stage.
In the past, use auto-gain circuit (AGC), to process the relatively large dynamic range of the input signal of the output place generation of non-linear or rectangular pulse formation device.In described application, agc circuit is configured to dynamic range to be divided into some overlaid windowss, and need complicated and fast circuit so that received signal level is maintained in correct window.For instance, if for the instantaneous lever selection of received signal wrong window, may be because receiver enters compression or drops on the contrary lower than the sensitiveness of receiver drop-out.As further supplementing of the speed to agc circuit and accuracy requirement, there is the requirement to overlaid windows.In order to minimize overlapping and therefore to minimize the number of AGC window, conventionally need tight receiver gain tolerance, this causes the circuit of complexity, costliness and power consumption.
Summary of the invention
An aspect of of the present present invention relates to a kind of equipment, described equipment can be configured for compandor with realize from input signal output signal through defining dynamic range.In particular, described equipment comprises: the first circuit, and it is suitable for producing first signal from input signal, and wherein first signal comprises the first dynamic range; And second circuit, it is suitable for producing secondary signal from input signal, and wherein secondary signal comprises the second dynamic range of the first dynamic range that is different from first signal.In another aspect, described equipment can comprise tertiary circuit, and it is suitable for producing the output signal relevant to the summation of first and second signal.By adjusting first and second dynamic range, can realize total dynamic range of the output signal of companding equipment.
In another aspect, the first circuit is configured to producing first signal and have the first sensitiveness or gain from input signal.In another aspect, second circuit is configured to producing secondary signal and have the second sensitiveness or gain from input signal, and wherein the second sensitiveness of second circuit or gain are different from the first sensitiveness or the gain of the first circuit.In addition, in another aspect, the first circuit can be configured to have the first compression point or threshold value, and second circuit is configured to have and is different from the first compression point of the first circuit or the second compression point or the threshold value of threshold value.
In aspect another, described equipment comprises the 4th circuit, and it is for adjusting respectively the first and/or second dynamic range of first and second circuit.In another aspect, the 4th circuit be suitable for being respectively first and/or second circuit produce reference voltage or electric current.The dynamic range characteristics of reference voltage or electric current adjustment first and/or second circuit.In another aspect, the 4th circuit comprises programmable reference level device, and it is suitable for producing the first or second reference voltage.
In aspect another, first or second circuit can comprise envelope detector, rectangular pulse form device, differential transistor to or differential amplifier.In another aspect, the first circuit comprises the first transistor pair, and its transistor has first size, and second circuit comprises transistor seconds pair, and its transistor has the second size that is different from the right transistorized first size of the first transistor.In aspect another, described equipment comprises first and second current source, and it is suitable for for first and second transistor is to providing first and second reference current.More on the one hand in, first or second circuit be suitable for having more than about 20% or 20% fractional bandwidth, approximately 500MHz or bandwidth more than 500MHz, or more than about 20% or 20% fractional bandwidth and approximately 500MHz or bandwidth more than 500MHz.
In the time considering by reference to the accompanying drawings, from following detailed description of the present invention, will easily understand other side of the present invention, advantage and novel feature.
Brief description of the drawings
Fig. 1 illustrates the block diagram of exemplary compandor according to an aspect of the present invention.
Fig. 2 illustrates the curve chart of the exemplary input-output response of exemplary compandor according to a further aspect in the invention.
Fig. 3 illustrates the block diagram of another exemplary compandor according to a further aspect in the invention.
Fig. 4 illustrates the block diagram of another exemplary compandor according to a further aspect in the invention.
Fig. 5 illustrates the block diagram of exemplary communication device according to a further aspect in the invention.
Fig. 6 illustrates the block diagram of another exemplary communication device according to a further aspect in the invention.
Fig. 7 A illustrates the sequential chart of various pulse modulation techniques according to a further aspect in the invention to Fig. 7 D.
Fig. 8 illustrates the block diagram that various communicators according to a further aspect in the invention communicate with one another via various channels.
Fig. 9 illustrates the block diagram of another exemplary compandor according to a further aspect in the invention.
Embodiment
Various aspect of the present invention is below described.Should be apparent, extensively various ways embodies teaching herein, and any ad hoc structure disclosed herein, function or both are only representational.Based on teaching herein, it will be understood by one of ordinary skill in the art that one side disclosed herein can be independent of any other side and implement, and can combine in every way in these aspects both or both more than.For instance, can come facilities and equipments or hands-on approach by the aspect of any number in the aspect set forth herein.In addition, can with except or be different from other one or more structure in the aspect set forth, functional or structure herein and functionally implement this equipment or put into practice the method.In addition at least one key element that, comprises a claim on the one hand.
As the example of some concept in above-mentioned concept, in certain aspects, the present invention relates to a kind of equipment, described equipment is configured as compandor is to realize the specified dynamic range of output signal in response to input signal dynamic range.In particular, described equipment comprises: the first circuit, and it is suitable for producing first signal from input signal, and wherein first signal comprises the first dynamic range (for example, the first sensitiveness and the first compression point); And second circuit, it is suitable for producing secondary signal from input signal, and wherein secondary signal comprises second dynamic range (for example, the second sensitiveness and the second compression point) of the first dynamic range that is different from first signal.Described equipment can further comprise tertiary circuit, and it is suitable for producing the output signal relevant to the summation of first and second signal.By adjusting first and second dynamic range, can realize total dynamic range of the output signal of companding equipment.
Fig. 1 illustrates the block diagram of exemplary compandor 100 according to an aspect of the present invention.Generally speaking, compandor 100 comprises multiple non-linear devices (for example, envelope detector), and described multiple non-linear devices are configured to have different sensitiveness and compression point separately.Compression point is spaced apart with the cumulative level of input signal.In this way, under low input power level, all envelope detectors (for example, all three detectors) all can just operate input signal is carried out to rectangular pulse substantially and form or detect.Under intermediate input power level, an only part (for example, two detectors) for envelope detector can just operate input signal is carried out to rectangular pulse substantially and form or detect.And under high input power levels, the only one in envelope detector can operate input signal is carried out to rectangular pulse formation or rectangular pulse and form.Envelope detector can have different sensitiveness, to realize the specified dynamic range of the output signal of compandor 100.
In particular, compandor 100 comprises the first envelope detector 102, the second envelope detector 104 and the 3rd envelope detector 106, the first differential amplifier 108, the second differential amplifier 110, the 3rd differential amplifier 112 and summing unit 114.Envelope detector 102,104 and 106 has being coupled and is suitable for receiving the input of input signal.The first envelope detector 102, the second envelope detector 104 and the 3rd envelope detector 106 have the corresponding output of the positive input that is coupled to the first differential amplifier 108, the second differential amplifier 110 and the 3rd differential amplifier 112.Reference voltage REF1, REF2 and REF3 are applied to respectively the negative input of differential amplifier 108,110 and 112.The input that summing unit 114 is coupled in the output of differential amplifier 108,110 and 112.The output signal of compandor 100 produces in the output of summing unit 114.
As discussed previously, envelope detector 102,104 and 106 can be configured to have different dynamic range (for example, different sensitiveness and compression point).For instance, the first envelope detector 102 can be configured to have relatively high sensitiveness and relatively low compression point.The second envelope detector 104 can be configured to have middle sensitiveness and intermediate compression point.The 3rd envelope detector 106 can have relatively low sensitiveness and relatively high compression point.
In this configuration, under the relatively low power level of input rf signal, the interpolation sensitiveness of envelope detector 102,104 and 106 (comprising the relatively high sensitiveness of the first envelope detector 102) contributes to detect the relatively low power level of input signal.Under the middle power level of input rf signal, the first envelope detector 102 can be in compression, and contributes to indistinctively the sensitiveness of compandor 100.Therefore,, in intermediate input power bracket, total sensitiveness of compandor 100 is sensitiveness in low power ranges lower than it.This allows to detect middle power level signal, prevents that downstream unit from entering compression simultaneously.Under the relatively high power level of input rf signal, the first envelope detector 102 and the second envelope detector 104 both all can be in compression, and contribute to indistinctively total sensitiveness of compandor 100.Therefore,, in high input power range, total sensitiveness of compandor is relatively low.This prevents that downstream unit from entering compression.
The reference voltage REF1-3 that is applied to respectively the negative input of differential amplifier 108,110 and 112 allows the adjustment of the dynamic characteristic of the output of compandor 100.For instance, any one the adjustment being applied in the reference voltage of negative input of differential amplifier causes the sensitiveness of alignment processing section (for example, envelope detector and corresponding differential amplifier) and the change of compression point effectively.This explains in more detail as got off.
Fig. 2 illustrates the curve chart of the exemplary input-output response of exemplary compandor 100 according to a further aspect in the invention.The x axle of curve chart or transverse axis represent to the power level taking dB as unit of the input signal of compandor 100.Y axle or the longitudinal axis represent the output of compandor 100, and it can be according to voltage or electric current.On curve chart, show three (3) individual exemplary response.Can represent the typical input-output response of compandor 100 through being shown as the first response of solid line.Release as noted, the first response comprises three sections with different sensitiveness: hypersensitivity, the middle sensitiveness under intermediate input signal level and the hyposensitivity under high input signal level under low input-signal level.
Represent the input-output response of compandor 100 in response to the equal increase of all reference voltage REF 1-3 through being shown as the second response of dotted line.Release as noted, the effect that equally increases all reference voltages is the right shift of input-output response.In fact this reduce total sensitiveness of compandor 100.On the contrary, all reference voltages reduce by cause input-output response to shifting left, and then increase total sensitiveness of compandor 100.
Represent that through being shown as the 3rd response of dotted line compandor 100 is in response to the input-output response as the increase of the only reference voltage REF 1 of the negative input that is applied to differential amplifier 108.Release as noted, the effect that only increases reference voltage REF 1 is the right shift that comprises the compresses lower section of the first compression point of the input-output response of compandor 100.On the contrary, only the reduction of reference voltage REF 1 by cause input-output response compresses lower section to shifting left.Each reference voltage REF1-3 can be independent of each other and adjust, to realize the appointment input-output response of compandor 100.
Fig. 3 illustrates the block diagram of another exemplary compandor 300 according to a further aspect in the invention.Generally speaking, compandor 300 operates in the mode that is similar to the compandor 100 of previously being discussed, there are sensitiveness different and that specify and multiple parallel devices of compression point because compandor 300 comprises, make the specified dynamic range of the output signal that realizes compandor 300.
In particular, compandor 300 comprise non-linear or substantially rectangular pulse form device 302, the first differential amplifier 304, the second differential amplifier 306, the 3rd differential amplifier 308 and summing unit 310.Rectangular pulse forms device 302 and comprises and be suitable for the output that receives the input of input signal and be coupled to the positive input of differential amplifier 304,306 and 308.Reference voltage REF 1-3 is applied to respectively the negative input of differential amplifier 304,306 and 308.The corresponding input of summing unit 310 is coupled in the output of differential amplifier 304,306 and 308.The output RF signal of compandor 300 produces in the output of summing unit 310.
Differential amplifier 304,306 and 308 can be configured to have different gain (sensitiveness) and threshold point (compression point).For instance, the first differential amplifier 304 can be configured to have relatively high gain and relatively low threshold point.The second differential amplifier 306 can be configured to have intermediate gain and middle threshold point.The 3rd differential amplifier 308 can have relatively low sensitiveness and relatively high compression point.
Be similar to previous aspect, under the relatively low power level of input rf signal, the interpolation gain of differential amplifier 304,306 and 308 (comprising the relatively high gain of the first differential amplifier 304) contributes to detect the relatively low power level of input signal.Under the middle power level of input rf signal, the first differential amplifier 304 can be in compression, and contributes to indistinctively the gain of compandor 300.Therefore,, in intermediate input power bracket, the overall gain of compandor 300 is lower than the gain in low power ranges.This allows to detect middle power level signal, prevents that downstream unit from entering compression simultaneously.Under the relatively high power level of input signal, the first differential amplifier 304 and the second differential amplifier 306 both all can be in compression, and contribute to indistinctively the overall gain of compandor 300.Therefore,, in high input power range, the overall gain of compandor is relatively low.This prevents that downstream unit from entering compression.
Equally, be similar to previous aspect, the reference voltage REF1-3 that is applied to respectively the negative input of differential amplifier 304,306 and 308 allows the adjustment of the dynamic characteristic of the output of compandor 300.For instance, be applied to any one adjustment in the reference voltage of negative input of differential amplifier and effectively cause the change of corresponding dynamic range, as discussed the previous aspect of previous combination.
Fig. 4 illustrates the block diagram of another exemplary compandor 400 according to a further aspect in the invention.Generally speaking, compandor 400 comprise be configured respectively for non-linear or substantially rectangular pulse form device multiple differential transistors to and for being provided for the programmable reference voltage device of the right respective sources pole tension of differential transistor.Differential transistor is to being equipped with different sensitiveness and compression point to realize the dynamic range of being wanted of output of compandor 400.In addition, programmable reference voltage device can be configured to produce for the right source voltage of corresponding differential transistor so that the adjustment of dynamic range of the output to compandor 400 to be provided.
In particular, compandor 400 comprise preamplifier 402, be configured into differential transistor to 404,406 and 408 multiple non-linear or substantially rectangular pulse form device, multiple current source 410,412 and 414, multiple reference voltage transistor M41, M42 and M43 and programmable reference level device 416.Preamplifier 402 comprises and is suitable for receiving the input of input rf signal and is coupled to the differential output of each differential transistor to 404,406 and 408 grid.Differential transistor comprises respectively the first differential transistor (M11, M21 and M31) and the second differential transistor (M12, M22 and M32) to 404,406 and 408.Current source 410,412 and 414 is coupled in differential transistor between 404,406 and 408 corresponding source electrode and Vss current potential track (its can in earthing potential).
Programmable reference level device 416 comprises the output of the grid that is coupled to transistor M41, M42 and M43.The source electrode of transistor M41, M42 and M43 is coupled to respectively differential transistor to 404,406 and 408 source electrode.The output of compandor 400 is regarded as differential transistor to the differential current Δ I between 404,406 and 408 drain electrode and the drain electrode of reference voltage transistor M41, M42 and M43.
Differential transistor can be configured to have different sensitiveness and compression point to 404,406 and 408.For instance, by calibrating transistorized width and the length aspect ratio of each differential transistor centering, the dynamic range that can cross over the output of compandor 400 realizes compression breakpoint.As an example, the first differential transistor can be configured to have relatively high sensitiveness and relatively low compression point to 404.The second differential transistor can be configured to have middle sensitiveness and intermediate compression point to 406.The 3rd differential transistor can have relatively low sensitiveness and relatively high compression point to 406.
Be similar to previous aspect, under the relatively low power level of input rf signal, differential transistor (comprising that the first differential transistor is to 404 relatively high gain) contributes to detect the relatively low power level of input signal to 404,406 and 408 interpolation sensitiveness.Under the middle power level of input rf signal, the first differential transistor can be in compression to 404, and contributes to indistinctively total sensitiveness of compandor 400.Therefore,, in intermediate input power bracket, total sensitiveness of compandor 400 is lower than the sensitiveness in low power ranges.This allows to detect middle power level signal, prevents that downstream unit from entering compression simultaneously.Under the relatively high power level of input rf signal, the first differential transistor to 404 and second differential transistor to 406 both all can be in compression, and contribute to indistinctively total sensitiveness of compandor 400.Therefore,, in high input power range, total sensitiveness of compandor is relatively low.This prevents that downstream unit from entering compression.
Equally, be similar to previous aspect, be applied to respectively differential transistor the reference voltage REF1-3 of 404,406 and 408 source electrode is allowed the dynamic characteristic of the output of adjusting compandor 400.For instance, effectively cause the change of sensitiveness and compression to being applied to any one adjustment in the reference voltage of source electrode of corresponding differential transistor, as discussed the previous aspect of previous combination.
Fig. 5 illustrates the block diagram of the exemplary communication device 500 that comprises exemplary receiver according to a further aspect in the invention.Communicator 500 can be particularly suitable for data to send to other communicator and receive data from other communicator.Communicator 500 comprises antenna 502, Tx/Rx spacer assembly 504, front-end receiver part 506, RF to baseband receiver part 508, Base Band Unit 510, base band to RF transmitter portion 512, reflector 514, data sink 516 and data producer 518.Receiver 506 can be configured to comprise at least some assembly in the assembly of the compandor of previously discussing.
In operation, data processor 516 can via pick up from remote communication devices RF signal antenna 502, send signal to front-end receiver part 506 Tx/Rx spacer assembly 504, amplify received signal receiver front end 506, RF signal is converted to baseband signal RF to baseband receiver part 508 and process baseband signal and receive data to determine the Base Band Unit 510 of received data from remote communication devices.Data sink 516 then can be carried out one or more defined operations based on received data.For instance, data processor 516 (for example can comprise microprocessor, microcontroller, Reduced Instruction Set Computer (RISC) processor, display, audio devices, headphone, it comprises the transducers such as such as loud speaker), medical apparatus, slide rail, table, data are made to the robot of response or mechanical device, user interface (for example, display), one or more light-emitting diodes (LED) etc.
In addition, in operation, data producer 518 can produce outgoi8ng data for the base band via outgoi8ng data being processed into the Base Band Unit 510 of baseband signal for transmitting, baseband signal being converted to RF signal to RF transmitter portion 512, regulate RF signal for the reflector 514 of launching via wireless medium, by RF signal be routed to antenna 502 isolate simultaneously receiver front end 506 input Tx/Rx spacer assembly 504 and RF signal amplitude is mapped to the antenna 502 of wireless medium and is transmitted into another communicator.Data producer 518 can be the data producer of transducer or other type.For instance, data producer 518 (for example can comprise microprocessor, microcontroller, risc processor, keyboard, pointing device, mouse or tracking ball), audio devices (for example, headphone, it comprises the transducers such as such as microphone), the robot of medical apparatus, slide rail, generation data or mechanical device, user interface (for example, display), one or more light-emitting diodes (LED) etc.
Fig. 6 illustrates the block diagram of the exemplary communication device 600 that comprises exemplary receiver according to a further aspect in the invention.Communicator 600 can be particularly suitable for receiving data from other communicator.Communicator 600 comprises antenna 602, front-end receiver 604, RF to baseband transmitter part 606, Base Band Unit 608 and data sink 610.Receiver 604 can be configured to comprise at least some assembly in the assembly of the compandor of previously discussing.
In operation, data processor 610 can via pick up from remote communication devices RF signal antenna 602, amplify received signal receiver front end 604, RF signal is converted to baseband signal RF to baseband receiver part 606 and process baseband signal and receive data to determine the Base Band Unit 608 of received data from remote communication devices.Data sink 610 then can be carried out one or more through defining operation based on received data.For instance, data processor 610 (for example can comprise microprocessor, microcontroller, Reduced Instruction Set Computer (RISC) processor, display, audio devices, headphone, it comprises the transducers such as such as loud speaker), medical apparatus, slide rail, table, data are made to the robot of response or mechanical device, user interface (for example, display), one or more light-emitting diodes (LED) etc.
Fig. 7 A illustrates that the different channels (channel 1 and 2) that defines using different pulse repetition (PRF) is as the pulse modulated example using in any one in described communication system in this article.Specifically, there is the pulse repetition frequency (PRF) to the pulse daley cycle 702 corresponding to pulse for the pulse of channel 1.On the contrary, there is the pulse repetition frequency (PRF) to the pulse daley cycle 704 corresponding to pulse for the pulse of channel 2.Therefore, can define pseudo-orthogonal channel by this technology, wherein there is relatively low colliding pulse possibility at described two interchannels.In particular, can be by realizing lower colliding pulse possibility for pulse with low duty cycle.For instance, by the suitable selection of pulse repetition frequency (PRF), can be in the time place's transmitting being different from for the pulse of any other channel for all pulses substantially of given channel.
The pulse repetition frequency (PRF) defining for given channel can be depending on the data rate of being supported by described channel.For instance, support the channel of extremely low data rate (for example, about thousands of bps or Kbps) can use corresponding low pulse repetition frequency (PRF).On the contrary, support the channel of relatively high data rate (for example, about some megabit per seconds or Mbps) can use corresponding higher pulse repetition frequency (PRF).
The different channels (channel 1 and 2) that Fig. 7 B explanation is defined using different pulse positions or skew is as the example of the modulation using in any one in described communication system in this article.According to the first pulse skew (for example, with respect to some preset time, not shown) as produce the pulse for channel 1 by the represented time point place of line 706.On the contrary, be offset as be used for by the represented time point place generation of line 708 pulse of channel 2 according to the second pulse.In the case of the pulse offset deviation between given described pulse (as represented by arrow 710), can reduce by this technology the colliding pulse possibility of two interchannels.According to any other signaling parameter defining for channel (for example, the accuracy of the sequential as discussed herein) and between device (for example, relative time clock drift) and determine, what can use that different pulses are offset makes to be used to provide orthogonal or pseudo-orthogonal channel.
What Fig. 7 C explanation was used in any one in described communication system in this article modulates with different sequential jump sequence the different channels (channel 1 and 2) defining.For instance, can frequently produce according to a time step sequence pulse 712 for channel 1, and can frequently produce according to another time step sequence the pulse 714 for channel 2.Determine according to the accuracy of the sequential between the particular sequence using and device, can provide orthogonal or pseudo-orthogonal channel by this technology.For instance, time step formula pulse position can not be periodically, to reduce the possibility from the repetition pulse collision of adjacent channel.
Fig. 7 D illustrates that the different channels that defines using different time-gap is as the pulse modulated example using in any one in described communication system in this article.Produce the pulse for channel L1 at special time example place.Similarly, produce the pulse for channel L2 at example place At All Other Times.In the same manner, produce the pulse for channel L3 at other time instance place.Conventionally, the time instance relevant with different channels and inconsistent or can be orthogonal, to reduce or to eliminate the interference of various interchannels.
Should be appreciated that, can define channel according to pulse modulation scheme by other technology.For instance, can expand pseudo-random number sequence or a certain other proper parameter or some other proper parameter based on difference and define channel.In addition, can the combination based on two or more parameters define channel.
Fig. 8 illustrates the block diagram that various ultra broadbands (UWB) communicator according to a further aspect in the invention communicates with one another via various channels.For instance, UWB device 1 802 is just communicated by letter with UWB device 2 804 via two parallel UWB channels 1 and 2.UWB device 802 is just communicated by letter with UWB device 3 806 via single channel 3.And UWB device 3 806 is just communicated by letter with UWB device 4 808 via single channel 4 again.Other is configured to possible.Described communicator can be used for many different application, and for example may be implemented in, in () headphone, microphone, biometric sensor, HR Heart Rate monitor, pedometer, EKG device, table, slide rail, remote controller, switch, tire pressure monitoring device or other communicator.
Fig. 9 illustrates the block diagram of another exemplary compandor 900 according to a further aspect in the invention.Compandor 900 comprises the first signal generation module 902 that is suitable for producing from input signal first signal, and wherein first signal has the first dynamic range.Compandor 900 further comprises the secondary signal generation module 904 that is suitable for producing from input signal secondary signal, and wherein secondary signal has the second dynamic range that is different from the first dynamic range.
Any one in above-mentioned aspect of the present invention may be implemented in many different devices.For instance, except medical application as discussed above, aspect of the present invention also can be applicable to healthy and body-building application.In addition, aspect of the present invention may be implemented in the slide rail for dissimilar application.Existence can be incorporated to other numerous application of any aspect of the present invention as described in this article.
Various aspect of the present invention has above been described.Should be apparent, extensively various ways embodies teaching herein, and any ad hoc structure disclosed herein, function or both are only representational.Based on teaching herein, it will be understood by one of ordinary skill in the art that one side disclosed herein can be independent of any other side and implement, and can combine in every way in these aspects both or both more than.For instance, can come facilities and equipments or hands-on approach by the aspect of any number in the aspect set forth herein.In addition, can with except or be different from other one or more structure in the aspect set forth, functional or structure herein and functionally implement this equipment or put into practice the method.As the example of some concept in above-mentioned concept, in certain aspects, can set up parallel channel based on pulse repetition frequency.In certain aspects, can set up parallel channel based on pulse position or skew.In certain aspects, can set up parallel channel based on time step sequence.In certain aspects, can set up parallel channel based on pulse repetition frequency, pulse position or skew and time jump sequence.
Those skilled in the art will appreciate that, can represent information and signal by any one in multiple different skill and technology.For instance, can represent to run through above description and data, instruction, order, information, signal, position, symbol and the chip of reference by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or optical particle or its any combination.
Technical staff will further understand, various illustrative components, blocks, module, processor, device, circuit and the algorithm steps described in conjunction with aspect disclosed herein can for example, through (being embodied as electronic hardware, numeral embodiment, simulation embodiment or both combinations, it can design by source code or a certain other technology), be incorporated to the various forms of programs of instruction or design code (for convenience's sake, can call it as " software " or " software module " herein) or described both combination.For this interchangeability of hardware and software is clearly described, various Illustrative components, piece, module, circuit and step are described at it aspect functional substantially above.By the described functional design constraint that hardware or software depend on application-specific and forces at whole system that is embodied as.Those skilled in the art can implement for each application-specific described functional in the mode changing, but this type of embodiment decision-making should not be interpreted as causing and departs from scope of the present invention.
Various illustrative components, blocks, module and the circuit of describing in conjunction with aspect disclosed herein may be implemented in integrated circuit (" IC "), access terminal or access point in or by integrated circuit (" IC "), access terminal or access point is carried out.IC can comprise through design to carry out general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, electric component, optical module, mechanical component or its any combination of function described herein, and can executive resident in IC, in IC outside or IC and code or the instruction of IC outside.General processor can be microprocessor, but in replacement scheme, processor can be any conventional processors, controller, microcontroller or state machine.Processor also can be through being embodied as the combination of calculation element, for example, and combination, multi-microprocessor, one or more microprocessors of being combined with DSP core or any other this type of configuration of DSP and microprocessor.
Should be understood that any certain order of the step in any disclosed process or the example that level is Sample Method.Based on design preference, should be understood that certain order or the level that can rearrange the step in described process, remain in scope of the present invention simultaneously.Appended claim to a method item presents the key element of various steps with sample order, and does not intend to be limited to presented certain order or level.
The method of describing in conjunction with aspect disclosed herein or the step of algorithm can be directly with hardware, to embody by the performed software module of processor or with described both combination.Software module (for example, comprising executable instruction and related data) and other data can reside in the data storages such as such as the following: RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, can handling dish, the computer-readable storage medium of known any other form in CD-ROM or technique.Sample storage media can be coupled to the machines such as such as computer/processor (for convenience's sake, can call it as " processor " herein), make processor for example, from read information (, code) and to write information to medium.Sample storage media can with the integral formula of processor.Processor and medium can reside in ASIC.ASIC can reside in subscriber's installation.In replacement scheme, processor and medium can be used as discrete component and reside in subscriber's installation.In addition, in certain aspects, any suitable computer program can comprise computer-readable media, and described computer-readable media comprises and one or more relevant code in aspect of the present invention.In certain aspects, computer program can comprise encapsulating material.
Although described the present invention in conjunction with various aspects, will understand, the present invention can have other amendment.The application's case is set contains any variation of the present invention, use or reorganization, and described variation, use or reorganization are followed substantially principle of the present invention and comprised departing from of this type of and this disclosure in the known and customary practice belonging in the technology under the present invention.
Claims (28)
1. for a compandor for signal processing, it comprises:
The first circuit, it is suitable for receiving input signal to produce first signal from described input signal, and wherein said first signal has the first dynamic range;
Second circuit, it is suitable for receiving described input signal to produce secondary signal from described input signal, and wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal; And
Tertiary circuit, it is suitable for producing the output signal of the described compandor relevant to the summation of described first and second signal,
Wherein, described the first circuit and described second circuit have different sensitiveness or compression point.
2. compandor according to claim 1, wherein said first signal is non-linearly relevant to described input signal.
3. compandor according to claim 1, it further comprises the 4th circuit, and described the 4th circuit is used for adjusting the described first or second dynamic range.
4. compandor according to claim 3, wherein said the 4th circuit be suitable for to described first or second circuit reference voltage or electric current are provided.
5. compandor according to claim 4, wherein said the 4th circuit comprises programmable reference level device, and described programmable reference level device is suitable for producing described reference voltage or electric current.
6. compandor according to claim 1, wherein said first or second circuit comprise envelope detector, rectangular pulse form device, differential transistor to or differential amplifier.
7. compandor according to claim 1, wherein said the first circuit comprises the first transistor pair, the right transistor of described the first transistor has tool first size, and further wherein said second circuit comprises transistor seconds pair, the right transistor of described transistor seconds has the second size that is different from the right described transistorized described first size of described the first transistor.
8. compandor according to claim 7, it further comprises first and second current source, and described first and second current source is suitable for for described first and second transistor is to providing first and second reference current.
9. a method of being processed input signal by compandor, it comprises:
Receive described input signal;
Produce first signal from described input signal, wherein said first signal has the first dynamic range;
Produce secondary signal from described input signal, wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal; And
Combine described first and second signal to produce the output signal of described compandor,
Wherein, described first signal uses different sensitiveness or compression point to produce with described secondary signal.
10. method according to claim 9, wherein said first signal is non-linearly relevant to described input signal.
11. methods according to claim 9, it further comprises adjusts the described first or second dynamic range.
12. methods according to claim 11, wherein adjust the described first or second dynamic range and comprise respectively generation reference voltage or electric current.
13. methods according to claim 12, wherein produce described reference voltage or electric current and comprise activation programmable reference level device.
14. methods according to claim 9, wherein produce described first or secondary signal comprise to described input signal carry out envelope detected or substantially rectangular pulse form.
15. methods according to claim 9, wherein producing described first signal comprises described input signal is applied to the first transistor pair, the right transistor of described the first transistor has first size, and further wherein produce described secondary signal and comprise described input signal is applied to transistor seconds pair, the right transistor of described transistor seconds has the second size that is different from the right described transistorized described first size of described the first transistor.
16. methods according to claim 15, it is further included as described first and second transistor to first and second reference current is provided.
17. 1 kinds of compandors for signal processing, it comprises:
For receiving input signal and for produce the first device of first signal from described input signal, wherein said first signal has the first dynamic range;
For receiving described input signal and installing for produce second of secondary signal from described input signal, wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal; And
For combining described first and second signal to produce the device of output signal of described compandor,
Wherein, described first device and described the second device have different sensitiveness or compression point.
18. compandors according to claim 17, wherein said first signal is non-linearly relevant to described input signal.
19. compandors according to claim 17, it further comprises the device for adjusting the described first or second dynamic range.
20. compandors according to claim 19, wherein said dynamic range adjusting device is suitable for providing reference voltage or electric current to described first device or described the second device respectively.
21. compandors according to claim 20, wherein said dynamic range adjusting device comprises programmable reference level device, and described programmable reference level device is suitable for producing described reference voltage or electric current.
22. compandors according to claim 17, wherein said first device or described the second device comprise envelope detector, rectangular pulse form device, differential transistor to or differential amplifier.
23. compandors according to claim 17, wherein said first device comprises the first transistor pair, the right transistor of described the first transistor has first size, and further wherein said the second device comprises transistor seconds pair, and the right transistor of described transistor seconds has the second size that is different from the right described transistorized described first size of described the first transistor.
24. compandors according to claim 23, it further comprises and is used to described first and second transistor to producing the device of first and second reference current.
25. compandors according to claim 17, wherein said first device or described the second device are suitable for having more than about 20% or 20% fractional bandwidth, approximately 500MHz or bandwidth more than 500MHz, or more than about 20% or 20% fractional bandwidth and approximately 500MHz or bandwidth more than 500MHz.
26. 1 kinds of headphones, it comprises:
The first circuit, it is suitable for receiving input signal and produces first signal from described input signal, and wherein said first signal has the first dynamic range;
Second circuit, it is suitable for receiving described input signal and produces secondary signal from described input signal, and wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal;
Tertiary circuit, it is suitable for producing three signal relevant to the summation of described first and second signal; And
Transducer, it is suitable for producing sound based on described the 3rd signal,
Wherein, described the first circuit and described second circuit have different sensitiveness or compression point.
27. 1 kinds of tables for signal processing, it comprises:
The first circuit, it is suitable for receiving input signal and produces first signal from described input signal, and wherein said first signal has the first dynamic range;
Second circuit, it is suitable for receiving described input signal and produces secondary signal from described input signal, and wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal;
Tertiary circuit, it is suitable for producing three signal relevant to the summation of described first and second signal; And
User interface, it is suitable for providing instruction based on described the 3rd signal,
Wherein, described the first circuit and described second circuit have different sensitiveness or compression point.
28. 1 kinds of sensing apparatus, it comprises:
The first circuit, it is suitable for receiving input signal and produces first signal from described input signal, and wherein said first signal has the first dynamic range;
Second circuit, it is suitable for receiving described input signal and produces secondary signal from described input signal, and wherein said secondary signal has the second dynamic range of described the first dynamic range that is different from described first signal;
Tertiary circuit, it is suitable for producing three signal relevant to the summation of described first and second signal; And
Transducer, it is suitable for producing data based on described the 3rd signal,
Wherein, described the first circuit and described second circuit have different sensitiveness or compression point.
Applications Claiming Priority (3)
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| US12/055,077 | 2008-03-25 | ||
| US12/055,077 US8254595B2 (en) | 2008-03-25 | 2008-03-25 | System and method of companding an input signal of an energy detecting receiver |
| PCT/US2008/058513 WO2009120201A1 (en) | 2008-03-25 | 2008-03-27 | System and method of companding an input signal of an energy detecting receiver |
Publications (2)
| Publication Number | Publication Date |
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| CN101978595A CN101978595A (en) | 2011-02-16 |
| CN101978595B true CN101978595B (en) | 2014-08-27 |
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| CN200880128179.1A Expired - Fee Related CN101978595B (en) | 2008-03-25 | 2008-03-27 | System and method of companding an input signal of an energy detecting receiver |
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| US (1) | US8254595B2 (en) |
| EP (1) | EP2258044A1 (en) |
| JP (1) | JP5575742B2 (en) |
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| CN (1) | CN101978595B (en) |
| TW (1) | TW200941957A (en) |
| WO (1) | WO2009120201A1 (en) |
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| US9088983B2 (en) * | 2013-08-06 | 2015-07-21 | Cisco Technology, Inc. | Interleaving low transmission power and medium transmission power channels in computer networks |
| US9172613B2 (en) | 2013-08-06 | 2015-10-27 | Cisco Technology, Inc. | Multiple topology routing architecture in computer networks |
| US8891588B1 (en) | 2013-08-06 | 2014-11-18 | Cisco Technology, Inc. | On-demand medium to low transmission power channel switching in computer networks |
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| WO2009120201A1 (en) | 2009-10-01 |
| CN101978595A (en) | 2011-02-16 |
| JP5575742B2 (en) | 2014-08-20 |
| KR20100137544A (en) | 2010-12-30 |
| US20090243699A1 (en) | 2009-10-01 |
| EP2258044A1 (en) | 2010-12-08 |
| TW200941957A (en) | 2009-10-01 |
| JP2011515986A (en) | 2011-05-19 |
| KR101167436B1 (en) | 2012-07-19 |
| US8254595B2 (en) | 2012-08-28 |
| KR20120066081A (en) | 2012-06-21 |
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